Pith Number

pith:75DC2QOT

pith:2010:75DC2QOT7FG6NASVWZ3FTQFXZA

not attested not anchored not stored refs pending

A Better Definition of the Kilogram

Jack Miller, Ronald F. Fox, Theodore P. Hill

arxiv:1005.5139 v2 · 2010-05-27 · physics.data-an · physics.pop-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{75DC2QOT7FG6NASVWZ3FTQFXZA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:07:07.115601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff462d41d3f94de68255b67659c0b7c8282ac37b1e71e32fa382390774613600

Aliases

arxiv: 1005.5139 · arxiv_version: 1005.5139v2 · doi: 10.48550/arxiv.1005.5139 · pith_short_12: 75DC2QOT7FG6 · pith_short_16: 75DC2QOT7FG6NASV · pith_short_8: 75DC2QOT

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/75DC2QOT7FG6NASVWZ3FTQFXZA \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: ff462d41d3f94de68255b67659c0b7c8282ac37b1e71e32fa382390774613600

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "715cc92fb2960e5ea381927ba4bee1f45ffdaa6866d0bcd10e723fdf24c567e7",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.data-an",
    "submitted_at": "2010-05-27T18:03:05Z",
    "title_canon_sha256": "0204781883663b3a13eaa45c9e619aeb72f5cde251d3f2008fc4625294c3c199"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.5139",
    "kind": "arxiv",
    "version": 2
  }
}